Lower crank-case for combustion-engines.



W. H. GOLDSTINE.

LOWER CRANK CASE FOR COMBUSTION ENGINES. APPLICATION FILED JULY 28,1910.

1,022, 11 3, Patented Apr. 9, 1912;

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W. H. GOLDSTINE.

LOWER CRANK CASE FOR COMBUSTION ENGINES.

APPLICATION FILED JULY 29, 1910.

1,022, 11 3, Patented Apr. 9. 1912.

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WILLIAM H. GOLDSTINE,

LOWER CRANK-CASE FOR Specification of Letters Patent.

Application filed July 28, 1910.

OF FLINT, MICHIGAN.

COMBUSTION-ENGINES.

Patented Apr. 9, 1912.

Serial No. 574,382.

To all whom it may concern Be it known that I, Vnmrnr II. Gonn- STINE, acitizen of the United States, residing at Flint, in the county ofGenesee and State of Michigan, have invented certain new and usefulImprovements in Lower Crank-Cases for Combustion-Engines; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention is a lower crank case for gasolene engines, and isparticularly adapted to automobile engines in which the lower part ofthe crank case is utilized as an oil reservoir. In engines of this type,it has heretofore been customary to east the lower crank case in onepiece and to also cast integral with the crank case a diaphragm orpartition dividing the case into a lower oil chamber and an upper crankchamber, the partition being so arranged that the movement of the crankssplashes oil from the lower chamber to lubricate the lower rodconnections of the engine, the oil then flowing over at one end of thepartition and returning into the lower chamber of the crank case.

To produce a lower crank case, all parts of which are easily accessiblefor cleaning and inspection, I have devised the crank case illustratedin the accompanying drawings, in which- Figure 1 is a top plan view ofthe crank case with the partition in place, Fig. 2 is a vertical sectiontaken on the line AA of Fig. 1, Figs. 3 and 4 are transverse sectionstaken on the lines waa and y g of Fig. 2 respectively, Fig. 5 is a topplan view of the removable partition, Fig. 6 is a side view, and Fig. 7is a transverse section taken on the line 2-2 of Fig. 5.

As is illustrated in the drawings, the device consists in the usuallower crank case 1, in which is removably mounted the partition 2. Bymaking the partition removable I avoid coring and reduce the liabilityof leaving core sand in such restricted parts of the casting as forinstance at 3 in Fig. 3. I preferably support the partition 2 on legs 4cast integral with the shell 1. The legs 4 are provided with lateralprojections 46 to take the studs or bolts 5 by which the partition 2 isfastened to the legs 1. The purpose of offsetting 4 as shown is toenable the drill to pass clear through 4 before it comes in contact withthe shell 1 so that there is less liability of accidentally drillingthrough the shell and causing a leak, than would be the case if the legs4 were made solid, providing the drill happened to be put through toofar. Partition 2 is formed with as many transversely disposed curvedgrooves 6 as there are cranks in the engine, to form channels alongwhich the cranks pass when the engine is in operation. Openings 7 areprovided in the partition adjacent the grooves 6, being connected tosaid grooves by chamber 8, to permit the oil to well up from below andflow slowly into the grooves to lubricate the cranks and pistons of theengine by splashin It will be noted that the edges 9 of the removablepartition 2 fit snugly into the shell 1. This is an important feature ofmy improvement, in that the oil contained in grooves 6 is prevented frombeing thrown out from the space above the partition, as would be thecase if the edges 9 were not close to the shell 1. At high speeds theengine is thereby prevented from working dry.

WVhen the end of the crank case is tilted, as in an automobile going uphill, the oil is prevented from suddenly surging to the rear end of thecrank case and thereby flooding the rear cylinders of the engine andallowing the forward cylinders to run dry. All the oil that reaches thecranks must rise through the openings 7 which are of such size that theoil may pass through but slowly. By this means the engine is thoroughlylubricated without danger of swamping the cylinders with oil or runningany of the cylinders dry when the crank case is tipped, as in ascendingor descending steep grades.

lVhile I have shown and described the removable partition 2 as beingmade of a casting, it will be understood that the partition may be madeof pressed sheet metal if desired, wire screen or any other suitablematerial.

By my improved construction I am enabled to produce a lower crank casethat is simple and strong and one in which there are no parts requiringthe use of thin sand cores and in which no parts of the shell aresubject to excessive shrinkage strain on account of sudden inequalitiesin thickness of the shell.

Having described my invention, What I claim and desire to secure byLetters Patent, is

A loWer crank case comprising a shell, a horizontally disposed partitionremovably received in the shell, said partition having transversecrank-grooves, said partition formed With openings intermediate saidgrooves, channels connecting said openings to said grooves; the lateraledges of said partition adapted to fit closely the Walls of the shell,and means carried by the shell to support the partition, for thepurposes set forth.

In testimony whereof, I affix my signature in presence of two Witnesses.

WILLIAM H. GOLDSTINE.

Vitnesses ADA E. DE BoL'r, CHRISTINE A. BRAIDEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latentsv Washington, I). 0.

